Can definitely feel a difference compared to what previous owner had in it. Gear changes smoother . Be careful the race spec miller gearbox oil seems to cause a whine, as it probably formulated to work better at higher temp(track use)

It shouldn't be causing a whine, has that happened just since the oil has been changed?

Cheers,

Guy

no mines not whining. it was a previous thread some mentioned that the race spec oil caused them issue. hence my choice at just the premium. the previous person swapped out for motul oil and the issue was resolved so on that occasion it was purely the oil causing the issue.
mine running very smoothly and quiet